Yealink CP920 Conference IP Phone, 3.1-Inch Graphical Display. 802.11n Wi-Fi, 802.3af PoE, Power Adapter Included
VoIP - IEEE 802.11b/g/n - Caller ID - Speakerphone - 1 x Network (RJ-45) - USB - SIP v2, SIP, IPv4, IPv6, NAT, DHCP, SNTP, UDP, TCP, SRTP, TLS Protocol(s)